Letter
Visibility
Chart
The information presented in this chart is based on lettering using the font Helvetica as black text on a white background in a composition using optimal negative space seen in natural lighting. This condition represents a sign with maximum legibility. Factors that would decrease the legibility of the sign are: font selection, color choice, lighting, negative space, and other environmental factors.
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| 0.5' |
14' |
| 0.75' |
22' |
| 1' |
29' |
| 1.25' |
36' |
| 1.5' |
43' |
| 1.75' |
51' |
| 2' |
58' |
| 2.5' |
72' |
| 3' |
87' |
| 3.5' |
101' |
| 4' |
116' |
| 4.5' |
130' |
| 5' |
145' |
| 6' |
174' |
| 8' |
232' |
| 10' |
290' |
| 12' |
348' |
| 16' |
464' |
| 18' |
522' |
| 20' |
580' |
| 24' |
696' |
| 30' |
870' |
| 36' |
1044' |
| 48' |
1392' |
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| 0.5' |
12' |
| 0.75' |
19' |
| 1' |
25' |
| 1.25' |
31' |
| 1.5' |
37' |
| 1.75' |
43' |
| 2' |
50' |
| 2.5' |
62' |
| 3' |
75' |
| 3.5' |
87' |
| 4' |
100' |
| 4.5' |
112' |
| 5' |
125' |
| 6' |
150' |
| 8' |
200' |
| 10' |
250' |
| 12' |
300' |
| 16' |
400' |
| 18' |
450' |
| 20' |
500' |
| 24' |
600' |
| 30' |
750' |
| 36' |
900' |
| 48' |
1200' |
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The information presented in this chart represents data interpreted from the Pennsylvania Transportation Institute, Penn State University and the United States Sign Council (USSC) ©1998.
Please refer to the original study, Sign Legibility.
The impact of Color and Illumination on Typical On-Premise Sign Fonts.
For further details please contact the USSC at (215) 785-1922.
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